Hello this is my first message here.
Later, i was summarizing my grammar and then i accidentaly clicked on two on my new learning lesson as “mark know” and i’m in the position of “knowing” something i didn’t made any reviews of 
.
Sadly, i didn’t found any measure to unbind these (i tried choosing them then clicking again to unmark them but didn’t work).
My question is simply : How to unmark the known lessons ?
Thanks for reading.
